Revision 2ee27796f298b710992a677a7e4d35c8c588b17e authored by Hans de Goede on 30 December 2018, 17:27:15 UTC, committed by Ingo Molnar on 19 April 2019, 17:23:13 UTC
The "ENERGY_PERF_BIAS: Set to 'normal', was 'performance'" message triggers on pretty much every Intel machine. The purpose of log messages with a warning level is to notify the user of something which potentially is a problem, or at least somewhat unexpected. This message clearly does not match those criteria, so lower its log priority from warning to info. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20181230172715.17469-1-hdegoede@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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booting.txt
Passing boot parameters to the kernel.
Boot parameters are represented as a TLV list in the memory. Please see
arch/xtensa/include/asm/bootparam.h for definition of the bp_tag structure and
tag value constants. First entry in the list must have type BP_TAG_FIRST, last
entry must have type BP_TAG_LAST. The address of the first list entry is
passed to the kernel in the register a2. The address type depends on MMU type:
- For configurations without MMU, with region protection or with MPU the
address must be the physical address.
- For configurations with region translarion MMU or with MMUv3 and CONFIG_MMU=n
the address must be a valid address in the current mapping. The kernel will
not change the mapping on its own.
- For configurations with MMUv2 the address must be a virtual address in the
default virtual mapping (0xd0000000..0xffffffff).
- For configurations with MMUv3 and CONFIG_MMU=y the address may be either a
virtual or physical address. In either case it must be within the default
virtual mapping. It is considered physical if it is within the range of
physical addresses covered by the default KSEG mapping (XCHAL_KSEG_PADDR..
XCHAL_KSEG_PADDR + XCHAL_KSEG_SIZE), otherwise it is considered virtual.
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